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India, NPLI (CSIR National Physical Laboratory of India)
Complete CMCs in Photometry and Radiometry for India (.PDF file)
Correlated colour temperature. Tungsten lamp, 2000 K to 3000 K
Absolute expanded uncertainty (k = 2, level of confidence 95%) in K: 20
Colorimeter
 
Luminous intensity. Tungsten lamp, 1 cd to 100 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 1.4, varies with measurand
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Luminous intensity. Tungsten lamp, 100 cd to 1000 cd
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.4
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance responsivity, tungsten lamp. Illuminance meter. Measurand unit, nA/lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.4
Reference lamps and photometers
Correlated colour temperature: 2000 K to 3000 K
 
Luminous flux. Tungsten lamp, 1 lm to 100 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.0 to 1.8, varies with measurand
Integrating sphere, goniophotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminous flux. Tungsten lamp, 100 lm to 20000 lm
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.8 to 1.9, varies with measurand
Integrating sphere, goniophotometer
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance. Tungsten lamp, 1 lx to 1000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6
Photometer
Correlated colour temperature: 2000 K to 3000 K
 
Illuminance. Tungsten lamp, 1000 lx to 5000 lx
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 2.0, varies with measurand
Photometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 1 cd/m2 to 10 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 2.0 to 1.8, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 10 cd/m2 to 1000 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.8 to 1.6, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Luminance. Tungsten lamp, 1000 cd/m2 to 10000 cd/m2
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.6 to 2.0, varies with measurand
Calibrated integrating sphere diffuser and telephotometer
Correlated colour temperature: 2000 K to 3000 K
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 6.0 to 1.9, varies with wavelength
Spectral irradiance comparator
Wavelength range: 280 nm to 400 nm
Bandwidth: 10 nm
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 1.9
Spectral irradiance comparator
Wavelength range: 400 nm to 800 nm
Bandwidth: 20 nm
 
Irradiance, spectral. Tungsten lamp, 0.001 W/(m2nm) to 0.2 W/(m2nm)
Relative expanded uncertainty (k = 2, level of confidence 95%) in %: 3.3 to 5.2, varies with wavelength
Spectral irradiance comparator
Wavelength range: 800 nm to 2500 nm
Bandwidth: 50 nm
 
Length instruments. Length interferometer system, 0 m to 1 m
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: 0.08
Comparison with master length interferometer
Approved on 04 May 2011
Internal NMI service identifier: NPLI/3
 
Length instruments. Length measuring machines, error of indicated distance, 0 m to 30 m
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.12, 0.5L], L in m
Comparison with master length interferometer
Least count: 0.1 µm
Approved on 04 May 2011
Internal NMI service identifier: NPLI/4
 
Length instruments. Length measuring machines, error of indicated distance, 0 m to 1 m
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.04, 0.5 L], L in m
Comparison with master length interferometer
Least count: 0.01 µm
Approved on 04 May 2011
Internal NMI service identifier: NPLI/5
 
Length instruments. Gauge block comparator, 0 mm to 150 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.032, 0.3L)
Mechanical comparison to gauge block
Approved on 04 May 2011
Internal NMI service identifier: NPLI/5-1
 
Line standards. Precison line scale, 0 m to 1 m
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: Q[0.2, 0.3L], L in m
Comparison with reference metre bar using trans-comparator and master length interferometer
Approved on 04 May 2011
Internal NMI service identifier: NPLI/6
 
End standards. Gauge blocks, central length, 0.5 mm to 305 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in µm: (0.015 + 0.31L), L in m
Interferometry, exact fractions
Orientation: vertical
Approved on 04 May 2011
Internal NMI service identifier: NPLI/7